"He was so shy and introverted, never looked people in the eye, " Liu says.

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And he was basically a, kind of, shy, introverted guy, but he, you know, and there was a necessity to be out there, to be a performer and to be extroverted.

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That is good for revealing a degree of character but it can be intimidating to some very good candidates who are more introverted, and even shy, in unfamiliar situations.

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